Good quality 3 valve faucet (tub) thats easy to repair?

Need to replace an Eljer. Standard 8" spacing. Want a brand that has a bibb seat which can be removed without hassle, and that I can get parts for easily. I'm told the Eljer might have been installed without being sweated in place; so I might have an easy time installing the new one. Have to cut open the wall to find out...

There are very few of those left since they don't meet current code (which requires anti-scald technology). Depending on your local inspector, replacement often would require bringing things up to code, and this isn't. While there are some anti-scald add-ons that could be plumbed into it, it becomes a bit more complex, and it's cheaper to just use something that does meet code out of the box.

Best one...of the very few still made....is Price Pfister. ( Actually known today as Pfister Faucets). It is still available as compression function ( with bibb washer and seats) but a better choice is the ceramic stem version. They use the same trim. Your choice of trims will be limited...dont look for venetian bronze! but parts will be available for your lifetime!

I can't say for sure that the union on your eljer will match up. Most likely you will have one union piece soldered to the pipe ( unless your plumbing is galv.) so you can unsweat that and replace with the new one if needed.

How big a hole do I need to cut behind the tub faucet to replace it? Want plenty of working room. The valves are 24" above the floor, the spout about 19". 3 valve type with 8" spacing. Its in a closet so I can go large... stud indicator says there's a stud in the middle...